Starting device



y 1950 s. YSSKIN 2,515,543

STARTING DEVICE Filed April 50, 1948 2 Sheets-Sheet l INVENTOR. i szi z'zz A TTORNEY July 18, 1950 s. YSSKIN 2,515,543

STARTING DEVICE Filed April 30, 1948 2 Sheets-Sheet 2 INVENTOR. i 195K122 i /M M ATTORNEY Patented July 18, 1950 UNITED STATES PATENT OFFICE STARTING DEVICE Samuel Ysskin, Newark, N. J.

Application April 30, 1948, Serial No. 24,220

9 Claims. (01. 74-9) This invention relates to improvements in starting devices such as are used for moving the starting device pinion into engagement with the engine flywheel on actuation of the starter motor.

It is an object of this invention to provide a starting device of the character described provided with novel means for smoothly and effectively moving the pinion into and out of engagement with the flywheel.

A further object of the invention is to provide a device of the character described with novel means for cushioning the parts in the engagement and disengagement operations, and for preventing injury to the parts by any excess stresses and strains encountered in operating conditions.

A further object of the invention is to provide a starting device having means to advance the pinion into engagement with the engine flywheel responsive to actuation of the starter motor, and to absorb any forces which would otherwise urge the pinion further by permitting the operating parts to override the pinion, thus preventing injury to the parts which might otherwise ensue.

A further object of the invention is to provide a startin device of the character described with novel cam members, having cam fingers of V outline disposed at an angle to the longitudinal axis of the cam members, providing for the advancing and retracting of the starter pinion in an efficient and positive manner.

These and other advantageous objects, which will appear from the drawings, and from the description hereinafter, are accomplished by the structure of my invention, of which an embodiment is illustrated in the drawings. It will be apparent, from a consideration of said drawings, and the following description, that the invention may be embodied in other forms suggested thereby, and such other forms as come within the scope of the appended claims are to be considered within the scope and purview of the instant invention.

In the drawings:

Fig. 1 is a side elevational view, partly fragmentary, of a starting device embodyin my invention, shown positioned on the armature shaft of a starter motor (shown fragmentarily),

Fig. 2 is an exploded perspective view of parts of the starting device of my invention,

Fig. 3 is a perspective view of the cam members and associated parts thereof,

Fig. 4 is a perspective view of the device, shown in partly engaged position,

Fig. 5 is a similar view of the device, in a fur-.

ther engaged position,

Fig. 6 is a vertical longitudinal sectional view, partly fragmentary, taken on line 6-6 of Fig. 1,

Fig. '7 is a fragmentary, longitudinal, vertical. sectional view, taken on line 1-1 of Fig. 5, and

Fig. 8 is a fragmentary elevational view of the cam members, showing the retract cam faces thereof engaged.

As shown in the drawings, the starting device of my invention is adapted for use in association with the armature shaft 8 of the starter motor M, and comprises a sleeve ll having a shouldered end It, a cam l5 slidably disposed on said sleeve and having an internally shouldered portion [4, a spring I2 interposed between the shouldered portion id of the sliding cam l5 and the shoul dered end l3 of the sleeve I I to normally urge said cam into engagement with a second or fixed cam 29, and other parts hereinafter described. The sleeve l I and cam 29 are secured to the armature shaft for rotation in unison therewith, as hereinafter more particularly described. One end of the cam I5 is provided with a ring l6, preferably formed integral therewith or secured thereto, having radial arms I I adapted to be slidably received in the recesses N3 of a collar 9. The latter is provided with an end wall 20 having a keyway 2| (Fig. 2) conforming to the outline of pinion 22, to slidably receive the latter. The pinion has a disc 23 fixed thereto or formed integral therewith, said disc, in the assembly of the parts, being positioned within the collar I9 with the pinion 22 disposed in the keyway 2! of said collar (see Fig. 6). A cushion ring 24 is positioned in the collar between the disc 23 of pinion 22 and a washer 25, the radial arms I! of the cam I5 being received within the recesses I8 of the collar; the parts mentioned are held against accidental displacement in said collar by the snap ring 26 positioned in the collar at the open end thereof (see Fig. 6) or by similar means. The pinion 22 is provided with a shouldered recess :21 or the like adapted to receive stop ring 34 or the like, fixed to the armature shaft S, on actuation of the starting device (Fig. 5), to limit movement of the pinion responsive to actuation of the starter motor. The sleeve H and cam 29 may be secured to the armature shaft S by any suitable means, as by a bolt 28 passing through an aperture 28a in the sleeve II and threaded within the threaded aperture 281) of the cam 29, the end of said bolt being positioned in a recess 280 in armature shaft S. The cam I5 is rovided with advance cam faces 30 and res tract cam faces 3| between said advance cam faces and defining therewith V-cam fingers lBa. The cam 29 is provided with complementary advance cam faces 32 and retract cam faces 33 be tween said cam faces 32 (Figs. 3 and and defining therewith V-cam fingers 29a.

By the arrangement described, it will be apparent that on energizing motor M, the second cam 29, being fixed to the armature shaft, will rotate therewith in a whipping action in the direction of arrow A, Fig. 4; this action will cause the cams to engage, so that the cam [5 will shift laterally on the armature shaft S, in the direction of arrow B, Fig. 4, moving the pinion into abutment with the stop ring 34, in which position said pinion will fully engage the engine flywheel.

As above noted, on actuation of the starter motor, cam 29 engages and shifts cam l5--and thereby the collar and pinionuntil the pinion engages the stop ring 35 (Figs. 5 and 7). shifting beyond that position of the parts, the radial arms ll of cam l5 move to the inner ends of recesses if! of collar l9, engaging the collar and sliding the collar along the pinion 22 to the degree permitted in the full compression of the cushion ring 22. Thus, it will be apparent that actuation of the pinion is obtained in a cushioned, continuous operation, smooth and positive advancement of the parts being assured from initiation of the starter motor to the point of completion of the pinion engagement cycle.

Normally, the flywheel will be engaged by the pinion for the short time required to start the engine motor, and the parts will then return to their inoperative (Fig. 1) position.

After the pinion has been moved against the stop ring 34, further engagement of the cams which might, in the conventional starter driving mechanism, result in straining the parts, would result in the collar 29 overriding the pinion as shown in Fig. 7 and in the compression of the cushion ring 24.

If, however, for any reason, the parts are actuated past the position shown in Fig. '7, the advance cam surfaces 32 of the fixed cam 29 will be thereby rotated past the advance cam surfaces of the cam member l5 so that the retract cam portions 33, SI of the cams will register, the cam l5 (collar is and pinion 22) snapping back to the inoperative position responsive to spring l2.

The V-cam fingers 29a, l5a, are disposed at an angle to the longitudinal axis of the members I5, 29. In the normal operation of the device; the advance cam fingers 32, of the cam members engage to advance the pinion into engagement with the engine flywheel, as above noted. If, for any reason, the spring l2 should be inoperative after the parts .have been advanced to their engaged position, the cam fingers l5a, 29a will engage (Fig. 8) to return the cam l5, pinion 22 and associated. parts to the inoperative position. Thus, the device is operative without inclusion of the spring !2.

Having thus described my invention, What I claim as new and desire to secure by Letters'Patent, is:

1. A mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, said mechanism comprising a sleeve adapted to be. fixed to the armature shaft of said starter motor, a pair of complementary cam members, one of which is adapted to be fixed to said shaft, the other slidably disposed on said sleeve, means engaging the sleeve and the last mentioned cam member, urging the lat- 4 ter toward the fixed cam member, a collar connected to the slidably disposed cam member and having a keyway to slidably receive the starter pinion, a stop member adapted to be secured to said armature shaft and to be engaged by the inion when the starter motor is energized to limit movement of said pinion.

2. A mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, said mechanism comprising a sleeve adapted to be fixed to the armature shaft of said starter motor said sleeve having a shoulbers, one of which is fixed to said shaft, the other r slidably disposed on said sleeve, and having a shouldered portion opposed to the shouldered end of the sleeve, a spring engaging the shouldered end of the sleeve and the said shouldered portion of the last mentioned cam member, urging the latter toward the fixed cam member, a collar connected to the last mentioned cam member for limited movement relative thereto and having a keyway to slidably receive the starter pinion, and cushioning means disposed in said collar between the pinion and slidably disposed cam.

3. A mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, said mechanism comprising a sleeve adapted to be fixed to the armature shaft of said star-termotor, a cam member adapted to be fixed to said shaft, a complementary cam member slidably disposed on said sleeve, spring means engaging said last named cam member and urging the same toward the cam member fixed to the shaft, a collar having an end wall provided with a keyway to receive the starter pinion, a disc fixed to the pinion and disposed in the collar, said collar having recesses, radial arms on the slidably disposed cam member received in said recesses, and cushioning means in the collar between the disc and last mentioned cam member.

4. A mechanism for actuating a starter pinioninto mesh with an engine flywheel on actuation of the starter motor, said mechanism comprising asleeve adapted to be fixed to the armature shaft of said starter motor, apair of complementary members, one of said members being slidably disposed on said sleeve and the other fixed thereto, said membershaving complementary engaging faces whereby, onrotation of the sleeve, the member slidably disposed thereon will be engaged by the member fixed thereto and will be axially moved on said sleeve, a stop member adapted to be secured to said shaft, a pinion slidably disposedon said shaft and having a, disc fixed'thereto, said pinion being adapted to engage the stop member to limit movement of the pinion on said shaft, a collar having a keyway slidably receiving said pinion, the disc of said pinion-being positioned within the collar, means on-said-collar. connecting the slidably disposed member on the sleeve to'the collar against displacement therefrom, while permitting limitedmovement thereof in said collar, and cushion means-in the comm-between said slidably disposed member and the disc.

5. In a mechanism for actuating a starter pinion into mesh with an engine flywheel on actuationof the-starter motor, a sleeve adapted to be fixed to the armature shaft of said starter motorsaidsleeve having a shouldered end, a cam slidably disposedzonsaid sleeve and having an internally shouldered portion opposed to the shouldered end of said sleeve, a spring interposed between the shouldered portion of the sliding cam and the shouldered end of the sleeve, a second cam positioned on and secured to said sleeve, radial arms unitary with one end of the slidably disposed cam, said cams being provided with complementary faces, to move the slidable cam relative to the fixed cam on rotation of the armature shaft in one direction, a pinion adapted to be slidably positioned on said shaft, a, collar having an end'wall provided with a keyway slid ably receiving said pinion, a disc fixed to said pinion and positioned Within the collar, a cushion ring positioned in the collar between the ring and disc, said collar having an open end having recesses to receive the radial arms of the slidable cam, means to secure said arms in said recesses against accidental displacement while permitting slight movement thereof in said recesses axially of the collar, said pinion having a shouldered recess, and a stop ring adapted to be fixed to the armature shaft, with which the recessed portion of said pinion is adapted to engage, to limit movement of the pinion responsive to ac tuation of the starter motor.

6. In a mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, a sleeve adapted to be fixed to the armature shaft of said starter motor, a, cam slidably disposed on said sleeve, a second cam positioned on and secured to said sleeve, radial arms unitary with one end of the slidable cam, said cams being provided with complementary faces to move the slidable cam relative to the fixed cam on rotation of the armature shaft in one direction, a pinion adapted to be slidably positioned on said shaft, a collar having an end wall provided with a keyway slidably receiving said pinion, a disc fixed to said pinion and positioned within the collar, said collar having an open end having recesses to receive the radial arms of the slidable cam, a member positioned in the collar at the open end thereof to secure said arms in said recesses against accidental displacement While permitting slight movement thereof axially of the collar in said recesses, a cushion ring positioned in the collar between the arm and disc said pinion having a shouldered recess, and a stop ring adapted to be fixed to the armature shaft, with which the recessed portion of said pinion is adapted to engage, to limit movement of the pinion responsive to actuation of the starter motor.

7. A mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, said mechanism comprising a driving member adapted to be fixed to the armature shaft of said starter motor, and a driven member engaged by the driving member, and thereby slidable on said armature shaft on rotation of the armature shaft and driving member, arms on said driven member, a collar having an open end provided with recesses receiving said arms, a member in the collar closing the recess openings at the open end of the collar, to secure said arms in said recesses against accidental displacement, while permitting slight movement of said arms in said recesses axially of the collar, an end wall on said collar, a pinion having a portion within said collar engaging said collar, and cushion means in said collar engaging said portion within the collar and said driven member and normally urging them apart.

3. In a mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, a cam and sleeve adapted to be fixed to the armature shaft of the starter motor, said sleeve having a shouldered portion, a cam having a shouldered portion opposed to the shouldered portion of said sleeve, said cam being slidably disposed on said sleeve, and a spring interposed between the shouldered portions of the sliding cam and sleeve to normally urge the slidably disposed cam toward the fixed cam.

9. In a mechanism for actuating a starter pinion into mesh with an engine flywheel on actuation of the starter motor, a driving member adapted to be fixed to the armature shaft of the starter motor, a driven member slidably disposed on said shaft, complementary faces on the driving and driven members to urge the driven member axially of said shaft on rotation of the driving member, a collar engaged by said driven member, a stop element adapted to be secured to the armature shaft, a pinion adapted to be slidably positioned on said shaft, and cushion means in the collar engaging the driven member and pinion to urge the pinion away from the driven member, whereby, on rotation of the driving member, the latter will engage the driven member, and move the same axially of the shaft, the driven member moving against the cushion means and thus moving the pinion against the stop, the collar being slidably connected to the pinion so that the cushion member may be further compressed against the pinion after the pinion has engaged the stop, responsive to further movement of the driven member.

SAMUEL YSSKIN.

EEFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 19,144 Doub Apr. 24, 1934 1,672,071 Martin June 5, 1928 1,700,214 Bijur Jan. 29, 1929 1,811,949 Marcus June 30, 1931 1,983,952 Tatman Dec. 11, 1934 2,271,216 Ysskin Jan. 27, 1942 

